The pie chart below shows the amount of pasta sold from Monday to Thursday.

(a)
The ratio of the amount of pasta sold on Wednesday to the amount of pasta sold to Monday was 3 : 2. What fraction of the amount of pasta was sold on Wednesday?
(b)
Draw the bars for the amount of pasta sold on Wednesday and Thursday in the graph above.

Ratio and proportion Applying charts and the mean 中文

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Worked solution

12(a)

1. Find the fraction represented by 1 unit of the ratio

Since the ratio of Wednesday to Monday is $3 : 2$ , Monday represents $2$ units.
$2 \text{ units} = \frac{1}{4}$
$1 \text{ unit} = \frac{1}{4} \div 2 = \frac{1}{8}$

2. Calculate the fraction for Wednesday

Wednesday represents $3$ units.
$3 \text{ units} = 3 \times \frac{1}{8} = \frac{3}{8}$

Answer

$\frac{3}{8}$

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The pie chart below shows the amount of pasta sold from Monday to Thursday.

Worked solution

12(a)

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